Where do we find pathogeneses of Causticum ? In Hahnemann's Chronic Diseases and the Materia Medica Pura . Give the general action of Causticum. Causticum acts through the medulla oblongata and recurrent laryngeal nerve, causing chiefly paralysis and catarrh of the larynx and trachea. It also causes paralysis in various parts of the body. What are the mental symptoms of Causticum ? Patients are timid ; nervous and anxious ; full of fancies, apprehensive, feel as if something were about to happen. Afraid to go to bed in the dark. Give seven characteristic symptoms of Causticum. 1. Cough relieved by a drink of water and accompanied by a spurt of urine.